Nuclear data

The Nuclear Data Center at FRIB was established in April 2015 under the U.S. Nuclear Data Program (USNDP). USNDP is funded by the U.S. Department of Energy Office of Science (DOE-SC) Office of Nuclear Physics (NP). Its mission is to provide current, accurate, authoritative data for workers in pure and applied areas of nuclear science and engineering, and to address gaps in the data through targeted experimental studies and the use of theoretical models. The FRIB data center contributes to USNDP primarily by compiling and evaluating experimental nuclear structure and decay data (directly measured or deduced) for two major databases:

The FRIB data center is responsible for evaluating data for the mass regions of A=31 to 44 and A=60 to 73 (excluding 62, 67-70 at other centers) assigned within the international network of Nuclear Structure and Decay Data (NSDD) evaluators, and for compiling data from the most recent publications with the priority given to nuclear structure and decay data from FRIB.

In addition, the FRIB data center takes the leading role in development of new utility and analysis codes for XUNDL compilation and ENSDF evaluation and in the modernization of the legacy ENSDF codes. The codes are hosted at the International Atomic Energy Agency (IAEA) website and widely used by the NSDD evaluators during the stages of compilation, evaluation, validation, and dissemination. 

As an integral part of FRIB, the data center takes the responsibility to provide data support to FRIB experimenters under the framework of the FRIENDS (FRIB Integral Experimental Nuclear Data Services) project as part of the laboratory support to FRIB users. Data support through the FRIENDS project covers all existing experimental nuclear structure and decay. It includes:

  • services for data needs in the stages of proposal preparation,
  • data taking,
  • data analysis,
  • publication preparation (aiming to help FRIB users for fast publication), and
  • checking data in proposals submitted to the FRIB Program Advisory Committee.

FRIB will enable significant discoveries about the properties of rare isotopes and is expected to generate a large amount of nuclear structure and decay data. The FRIB data center will serve to enhance these scientific discoveries by promptly compiling, evaluating, and disseminating all new data from FRIB. It will also establish procedures and effectively guide researchers to prepare/publish data from the operation of the accelerator facility at FRIB in a proper format that is convenient for reading, extracting, and compiling.